The Castle’s the Key

You knew you couldn’t take the elves at their word when they said this castle’s been abandoned for generations, but here you all are: up to your necks in peril. Again. One of you figured out the key was able to magically change shape, granting access to the secret room. One of you kept everyone together during that ambush in the smoke-filled room. And one of you (there’s always one!) is currently pinned to the wall by a poison barb trap…